The contribution aims at connecting the studies and the debates on the Italian form of government, on the one side, and on the eu institutions on the other side. It argues that the “circuit of political direction” is unique, although articulated and complex. Subsequently, it examines the main effects originated by the European integration on the Italian form of government, consisting in an increase of the powers of the Government and of the President of the Council as well as the adaptation of the administration. In conclusion, it shows how the composite European Constitution is made of legal provisions related both to the protection of fundamental rights and the separation of powers